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(1/3)*x-(5/42) = 6 // - 6
(1/3)*x-(5/42)-6 = 0
(1/3)*x-5/42-6 = 0
1/3*x-257/42 = 0 // + 257/42
1/3*x = 257/42 // : 1/3
x = 257/42/1/3
x = 257/14
x = 257/14
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